On 2/13/2011 8:41 AM, db_sonic wrote:

I got an amazing sun tan under that old ASW19 canopy. But nothing of
the sort with my DG800.
Anecdotal evidence may be indicating the canopy material of the 80's
and earlier simply let this radiation through?

Anecdotal evidence can be the best kind sometimes...it's from the real world!

I remember in 1972 or 1973 Wil Schuemann coming into the office one Monday
looking like a negative raccoon: pale around the eyes with thin pale stripes
from eyeball corners to his ears, and considerably redder everywhere else on
his face. He'd gotten that way soaring his ASW-12 (in MD, but I don't remember
whether in wave) wearing glass sunglasses and the usual goofy hat.

My subsequent under-canopy experience mostly in the intermountain west has
never replicated his. If it happens it must be possible...

Regards,
Bob W.